Ironing shoe



March 27 1945. A. H. HAPPE v 2,372,270

IRONING SHOE,

Filed Feb. 11, 1941 2 Sheets-Sheet l ATTORNEYS FIG.3.

A. H. HAPPE IRONING SHOE March 27, 1945. I

Filed Feb. 11, 1941 2 Sheets-Sheet 2 INVENTOR.

ARTHU'R H.HAPPE ATTORNEYS v Patented Mar. 27, 1945 moms snoa Arthur 1:.nsppe, Detroit, Mich., assig'nor of onehalfto Herman A. Sperlich,Detroit, Mich.

Application February 11, 1941, Serial No. 378,392

2 Claims.

The present invention relates to ironing shoes for ironing machines orthe like and among the objects thereof is a shoe which is more efficientin heating and retains its heat for a longer period than thoseheretofore in use.

Another object is a heating element and mounting which retains itsefllciency and does not become less eflicient with age and use.

Still another object is a shoe in which the heating unit may readily bereplaced if such operation should become necessary.

Another object is a shoe in which the heating is accomplished byradiation rather than is usually attempted by contact and directabsorption.

Other objects will readily occur to those skilled in the art uponreference to the accompanying drawings and the following specification.

In the drawings:

Figure 1 is a front view in elevation of a shoe.

Figure 2 is a back view in elevation of the same.

Figure 3 is a view similar to Figure 2 but with parts removed.

Figure 4 is a view of the inner face of the in sulating pad.

Figure 5 is an end view of the shoe.

Figures 6 and 7 are respectively sections on the lines 6-8 and 11 ofFigure 2.

As indicated, the shoe comprises a metal, preferably cast iron, castingI having its front face ll suitably curved to cooperate with a roll (notshown) and having its rear face flattened and provided with a narrow,relatively deep groove I extending completely around the face near theedge thereof. Suitable screw studs it are also fixed in said face forsecuring in place the insulating pad indicated as a whole at i 1. Y

The pad I! consists of a sheet metal tray Ila level full of a suitableheat insulating material llb, the preferred material being thatdescribed in my copending application, Serial No. 375,923, filed January25, 1941-, on Heat insulating ma terial.

While thi material is preferred, there may be used any suitable materialhaving the characteristics Ofhlgh heat insulating-quality. h gh heatresistance, and more or less physical. penetrabiHty. i. e., sponginessand somewhat soft.

The heating element itself consists of a suitable coiled wire 20 uponwhich is strung a plurality of short pieces of high dielectricrefractory tubes 2| of such dimension laterally as to fit loosely withinthe narrow relatively deep grove IS. The ends oi the coil are connectedto the terminal posts 22 carried in a high dielectric refractory block23, the element 2il'2l being placed in groove II and maintained in placeby the Dad ll. Suitable openings in the latter provide for passage ofthe studs I i and the outer face of block 23.

In preparing the several parts before assembly. the grooves iii arecoated inside with a suitable coating material which is black in colorand remains permanently so while the adjacent face of the shoe is coatedwith aluminum paint. Fur.- ther, the refractory tubes 2i may be coatedwith a similar black coating either inside or out or both.

Further the face of the material llb adjacent the shoe I0 is likewisecoated with aluminum paint before assembly.

It should also be noted that the grooves i5 may be cored groove and,therefore, do not necessarily fit the tubes 2| so that a large area ofcontact between the tubes and the groove walls does not usually existand the heating of the shoe lilis through radiation from the greaterpart of the perimeter of the'heating element embedded in the groove,assisted by the black absorptive surface. The aluminum painted surfacesad in maintaining the temperature of the shoe is P venting to a greatextent the passage of heat to and into the mass of insulation.

I am aware that the invention maybe embodied in other specific formswithout departing from the spirit or essential attributes thereof, and Itherefore desire the present embodiment to be considered in allrespectsas illustrative and not restrictive; reference being had to the appendedclaims rather than to the foregoing description to indicate the scope ofthe invention.

Iclaim: I

1. An ironing shoe consisting of a metal shoe having a groove in therear face thereof, said groove having a permanently black coating on thewalls thereof, an electric heating element seated loosely in saidgroove, said element consisting of a resistance heated wire passingthrough sections of'porcelain tubing, a body of heat insulating materialsecured over said face and groove and retaining said element in thelatter,

means in said groove for aiding absorption of heat from said element andmeans for reducin absorption of heat from said shoe by said insulatingmaterial.

2. An ironing shoe consisting of a, metal shoe having a groove in therear face thereof, said groove having a permanently black coating on thewalls thereof, an electric heating element seated loosely in saidgroove, said element consisting of a resistance heated wire passingthrough sections of porcelain tubing, each being provided with apermanently black coating on its inner and outer surfaces, 9. body ofheat insulating material secured over said face'and groove and retainingsaid element in the latter, mean in said groove for aiding absorption ofheat from said element and means for reducing absorption of heat fromsaid shoe by said insulating material.

" ARTHUR H. HAPPE.

